“It is easy to learn how to use these controllers,” says Travis Good, editor at Make magazine. “Even kids can do it.” They sure can with a kit from littleBits. On these microprocessor boards, each color is an input, a processor, or an output. The parts snap together and in only one way so that it is impossible for inexperienced users to make a mistake. Kids can prototype systems without worrying that they will damage the parts by lack of knowledge. LittleBits are pricier than the plain Arduino. A starter kit costs almost $90.